COMPARTMENT DESIGNATION/DECKNUMBERING SYSTEMLearning Objectives: When you finish this chapter,you will be able toRecall compartment designations.Recall deck lettering and numbering systems.Every space in a ship (except minor spaces, such aspea coat lockers, linen lockers, and cleaning gearlockers) is assigned an identifying letter and numbersymbol. This symbol is marked on a label plate securedto the door, hatch, or bulkhead of the compartment.Compartments on the port side end in an even numberand those on the starboard side end in an odd number(fig. 8-11). A zero precedes the deck number for alllevels above the main deck. Figure 8-12 shows thesystem of numbering decks.Ships compartment designations consist of a decknumber, a frame number, the relationship of thecompartment to the centerline, and a letter showing theuse of the space. Where a compartment extends throughtwo or more decks, the number of the lower deck is used.The frame number indicates the foremost bulkhead ofthe compartment. If the forward boundary is betweenframes, the frame number farthest forward within thecompartment is used.Compartments located on the centerline carry thenumber 0. Compartments to starboard are given oddnumbers, and compartments to port are given evennumbers. Where two or more compartments have thesame deck and frame number, they have consecutivelyhigher odd or even numbers, as applicable, numberingfrom the centerline outboard. For example, the firstcompartment to starboard is 1, the second is 3, and soon. To port of the centerline, they are numbered 2, 4, andso on. When the centerline passes through more thanone compartment with the same frame number, thecompartment having the forward bulkhead throughwhich the centerline passes carries the number 0.Compartments above the main deck are numbered 01,02, 03, as applicable, shown in figure 8-12.The last part of the compartment number is theletter that identifies the primary use of the compartment.On dry and liquid cargo ships, a double letter is used forcargo holds to differentiate them from spacescontaining the same commodity for use by the ship (forexample, fuel oil). Compartment usage in the presentsystem is shown in table 8-1.8-11Student Notes:Figure 8-11.Compartment designations.Figure 8-12.Deck numbering system.